Fair-stitch sewing-machine



(No Model.) 2 Shuts-Sheet 1.

E. MOWER. PAIR STITCH SEWING MACHINE.

No. 507,377. Patented Oct. 24,1893.

\A/ITNEEEEE |N\/ENTEIR (No. Model.) 2 ShetS-Sheet 2.

. E.P.'M0wER v FAIR STITCH SEWING MAGHINE. No. 507,377. V Patented 001;.24, 1893.

MTNEEEEE UNITED STATES PATENT OFFICE.

EDWIN F. MOWER, OF BOSTON, MASSACHUSETTS.

FAIR-STITCH SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 507,377, dated October24-, 1893.

Application filed February 10. 1893. Serial No. 461,788- (No model.)

To all whom it may concern.-

Be it known that I, EDWIN F. MOWER, of Boston, in the county of Sufiolkand State of Massachusetts, have invented a new and useful Improvementin Fair-Stitch Machines, of which the following, taken in connectionwith the accompanying drawings, is a specification.

My invention relates to mechanism for producing that class of boot orshoe ornamentation that is known as fair stitch, the object being to dothe work with greater rapidity and to save in the amount of thread used.This ob ectI attain by the mechanism shown in the accompanying drawings,in which- Figure 1 is a view, partly in side elevation and partly insection showing a machine adapted to produce my improved fair stitch.Fig. 2 1s a perspective view showing the parts of the machine that aremore intimately connected with producing my improved fair st tch. Figs.3 and 4 illustrate more in detall the action of the recess and stitchformmg tools. Fig. 5 is a sketch in plan, adapted to llustrate theposition of the thread in relation to the awl and the stitch formingtool, during the operation of the machine. Fig. 6 shows by enlargedelevation the form of the end of the stitch forming tool.

Although this machine is especially adapted for ornamenting the edges ofsoles of boots or shoes in close proximity to the rand, I have not shownin the drawings a boot or shoe, as its presence would hide the workingparts, but have shown the machine as working upon a piece of detachedleather, the action, of course, being the same as though the ltlalatherformeda part of the sole of a boot or s 0e.

In the drawings, A represents the base of the machine; B the standard; Bthe arm, and B the head; all of these parts together represent what maybe called the frame of the machine and are adapted to support the movingparts.

0 is the main shaft havinga balance Wheel (Y'and a driving pulley C. Atthe front end of the shaft 0 I have crank disk 0 which gives motion tothe bar 0 by means of a pitman C The bar 0 having a tool 0 adapted toform recesses in the leather, as

illustrated in Fig. 3, that is, to make a hole in the leather, but notto go through; that is, the tool 0 prepares a recess into which thestitch forming tool D may force the thread T (as shown in Fig. 4), therecess being of such size as to firmly hold the thread, thus forming afair stitch ornamentation.

The stitch forming tool D is forked at its end as shown in Fig. 6, thebranch d being hollowed out at its lower extremity so as to hold thethread and force it down into the recess formed for it by the tool 0 thebranch d serves to hold the thread of the previously formed stitch inplace while the new stitch is being made.

The stitch forming tool D, is attached to a lever D, said lever beingpivoted at D to a standard B this lever being operated by an eccentricD, on the shaft G the motion being transmitted from the eccentric D bymeans of D rocker arm D rocker shaft D rocker arm D link D andconnecting pin D The thread '1 passes around a tension device T',through a take-up T and a thread guide F. The details of this part aswell as of the feed device, E and presser foot device E, need not bedescribed in this application, as they are ordinary devices and wellunderstood.

To prevent the thread T from being cut off by the tool 0 in its descent,the thread guide F holds it at an angle from the line of stitches, asshown in Fig. 5, so that as the awl descends in a vertical direction,occupying the place indicated by c (Fig. 5) it will not come in contactwith the thread. The movement of the stitch forming tool D not beingvertical, but in an inclined curved line (as shown in Fig. 1), itshollowed out branch 61 will engage with the thread and carry it over andinto the hole at c (Fig. 5) and the branch cl will hold the thread inthe previously formed stitch.

From the above description and inspection of Figs. 3, 4:, and 5, it isevident that I do not form a complete stitch,-but simply a loop as animitation of one, which as a matter of ornament, is equally useful asthe ordinary fair stitch ornamentation, and does not require more thanhalf the thread and enables me to loop in place substantially as and forthe purpose as before set forth.

In testimony whereof I have signed my name to this specification, in thepresence of 15 two subscribing witnesses, on this 2d day of November, A.D. 1892.

EDWIN F. MOWER.

Witnesses:

FRANK G. PARKER, EDWARD S. DAY.

